Just ran out to my 4Runner and got some measurements. (Just happened to have a tape measure in the glove box.)

I've got a TJM T-15...the one w/ the hoops mounted to my 2002 4Runner. It comes with a bar mounted in the middle hoop running from side it side to mount 2 lights too. This bar sticks out a little further than the actual bumper. There is also 2 bumper cushions that stick out further than that. So the below measurements are of the bumper itself, light bar & cushions from the center bottom of the grill.